CHICAGO (WLS) --Police said Wednesday night that three weapons with blades are believed to have been used to kill a family of six in their home nearly a week ago. A police spokesperson said that those weapons have not been recovered.
Earlier Wednesday, a bio-cleaning team scrubbed the home in the city's Gage Park neighborhood. The father of the two youngest victims is expected to arrive in Chicago Wednesday evening.
PHOTOS: 6 family members murdered in Gage Park home
The crew from Bio-One Chicago spent most of the day inside the home in the 5700-block of South California Avenue. It's part of the police department's effort to turn the house back over to surviving relatives.
"They're not in a rush, but they want to get in there. Anything that's of sentimental value, they would like to have," said Dawn Valenti, Chicago Survivors.
The team brought steamers and chemicals inside through the back door, to avoid disturbing the memorial out front. A steady stream of mourners continued to stop by Wednesday with a candle and a prayer for the victims.
"We don't want them to see what happened, we want them to remember the family as it was," said Bill Muir, Bio-One Chicago.
The gruesome job should be done by the time the boys' father arrives in Chicago from Mexico, where he's been waiting for a humanitarian visa to allow him to come claim the bodies.
Because four of the victims were Mexican nationals, the Mexican consulate has been providing legal assistance. They also tell us all funeral expenses are being split between the local governments here and in Mexico.
"There is a crime victim compensation fund," said Consul Marcelino Miranda. "The Illinois government is paying for all the expenses up to the point the remains arrive in Mexico and then after that it's the local governments."
Police describe the inside of the home as a "bloody mess" where six members of the Martinez family were killed. Some were beaten and stabbed or shot. The victims were identified as Noe Martinez Sr., 62; Rosaura Martinez, 58; Noe Martinez Jr., 38; Maria Herminia Martinez, 32; Leonardo Cruz, 13; and Alexis Cruz, 10.
Leonardo and Alexis' father is expected to arrive in Chicago from Mexico on Wednesday.
A funeral service for the victims will be held at 4:30 p.m. Sunday at St. Gall Catholic Church, which is located at 5511 South Sawyer Avenue in Chicago.
An Illinois crime victims fund is covering the cost of the service. The Mexican government will pay for the burials, when their remains arrive in the country.
Police believe the family was targeted. The doors of the home were locked and nothing was taken. Investigators said the idea that this was a home invasion gone bad is highly unlikely, but they have not given a motive.
Investigators are sorting through evidence to figure out why the family was killed.
"Detectives have been working very hard on this case. We've looked at everything from the video that we know was at the light pole on the corner to - we went back over the previous 24 hours and literally pulled video from every CTA bus that went down California," Interim Chicago Police Superintendent John Escalante said.
Police said that they have a lot of resources committed to this case and they are confident it will be solved.